This cluster randomised trial tests the effectiveness of using specific exposure in vivo techniques during the return-to-work (RTW) phase in the occupational rehabilitation of workers with mental health problems. This interventions entails making an inventory of work tasks and their level of anxiety they evoke. These tasks will be gradually integrated in the RTW plan. This intervention is compared to occupational rehabilitation as usual. The main outcome measure is time to full return to work. Cost-effecetiveness of the intervention will be conducted form a societal perspective. 60 occupational physicians were randomised in two groups and are expected to include 200 workers in total.